It’s the YouTube craze that’s swept the globe — and now it’s hit the skies. On a recent Frontier Airlines flight, an ultimate Frisbee team from Colorado College launched its own version of the Harlem Shake in the aisle of the plane, complete with someone rocking out in a banana costume. (Now how do you fit that into a carry-on?)

Though it seemed like it was all in good fun, the Federal Aviation Administration isn’t convinced. According to ABC’s “Good Morning America,” the agency is looking into the incident to make sure the students weren’t in violation of any safety regulations (such as interfering with flight attendants or standing during take-off/landing). The students claim they cleared their dance with the flight attendants first and waited until the seatbelt sign was off. A Frontier spokesperson says the plane’s safety was never in jeopardy.